package com.zhongying.jf;

import org.apache.commons.lang3.StringUtils;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

import java.io.*;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;

/**
 * 公共服务
 * Created by liyuxuan on 2016/5/27.
 */
@Service
public class CommonClientService {



    private static final Logger LOGGER = LoggerFactory.getLogger(CommonClientService.class);


    /**
     * post 封装
     *
     * @param url
     * @param param 参数 map形式传入
     * @return json数据
     */
    public synchronized static String post(String url, Map<String, Object> param) {

        System.out.println(url);

        HttpPost post = new HttpPost(url);
        post.addHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");
//        post.addHeader("Content-Type", "application/json;charset=UTF-8");

        String paramsEncoding = "UTF-8";

        StringBuilder encodedParams = new StringBuilder();
        for (Map.Entry<String, Object> entry : param.entrySet()) {
            try {
                if(!StringUtils.isBlank(entry.getKey())&& null != entry.getValue()){
                    encodedParams.append(URLEncoder.encode(entry.getKey(), paramsEncoding));
                    encodedParams.append('=');
                    encodedParams.append(URLEncoder.encode(entry.getValue().toString(), paramsEncoding));
                    encodedParams.append('&');
                }
            } catch (UnsupportedEncodingException e) {
                //TODO 异常
            }
        }
        byte[] body = new byte[0];
        try {
            body = encodedParams.toString().getBytes(paramsEncoding);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        HttpEntity entity = new ByteArrayEntity(body);

        post.setEntity(entity);
        CloseableHttpClient httpClient=null;
        try {
            httpClient = HttpClients.createDefault();
            CloseableHttpResponse res = httpClient.execute(post);
            String json = EntityUtils.toString(res.getEntity());
            return json;

        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if(null != httpClient) {
                try {
                    httpClient.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return "{\"code\":\"network_exception\",\"msg\":\"网络异常\"}" ;
    }



    /**
     * post 封装
     *
     * @param url
     * @param param 参数 map形式传入
     * @return json数据
     */
    public static String postrest(String url, Map<String, Object> param) {

        System.out.println(param);

        HttpPost post = new HttpPost(url);
        post.addHeader("Content-Type", "application/json;charset=UTF-8");

        String paramsEncoding = "UTF-8";

        StringBuilder encodedParams = new StringBuilder();
        for (Map.Entry<String, Object> entry : param.entrySet()) {
            try {
                if(!StringUtils.isBlank(entry.getKey())&& null != entry.getValue()){
                    encodedParams.append(URLEncoder.encode(entry.getKey(), paramsEncoding));
                    encodedParams.append('=');
                    encodedParams.append(URLEncoder.encode(entry.getValue().toString(), paramsEncoding));
                    encodedParams.append('&');
                }
            } catch (UnsupportedEncodingException e) {
                //TODO 异常
            }
        }
        byte[] body = new byte[0];
        try {
            body = encodedParams.toString().getBytes(paramsEncoding);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        HttpEntity entity = new ByteArrayEntity(body);

        post.setEntity(entity);
        CloseableHttpClient httpClient=null;
        try {
            httpClient = HttpClients.createDefault();
            CloseableHttpResponse res = httpClient.execute(post);
            String json = EntityUtils.toString(res.getEntity());
            return json;

        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if(null != httpClient) {
                try {
                    httpClient.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return "{\"code\":\"network_exception\",\"msg\":\"网络异常\"}" ;
    }



    public static String sendPost(String url,  Map<String, Object> param) {
        String paramsEncoding = "UTF-8";
        StringBuilder encodedParams = new StringBuilder();
        for (Map.Entry<String, Object> entry : param.entrySet()) {
            try {
                if(!StringUtils.isBlank(entry.getKey())&& null != entry.getValue()){
                    encodedParams.append(URLEncoder.encode(entry.getKey(), paramsEncoding));
                    encodedParams.append('=');
                    encodedParams.append(URLEncoder.encode(entry.getValue().toString(), paramsEncoding));
                    encodedParams.append('&');
                }
            } catch (UnsupportedEncodingException e) {
                //TODO 异常
            }
        }
        return sendPost(url,encodedParams.toString());
    }

    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url
     *            发送请求的 URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param) {
        PrintWriter out = null;
        BufferedReader in = null;
        String result = "";
        try {
            URL realUrl = new URL(url);
            // 打开和URL之间的连接
            URLConnection conn = realUrl.openConnection();
            // 设置通用的请求属性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            // 发送POST请求必须设置如下两行
            conn.setDoOutput(true);
            conn.setDoInput(true);
            // 获取URLConnection对象对应的输出流
            out = new PrintWriter(conn.getOutputStream());
            // 发送请求参数
            out.print(param);
            // flush输出流的缓冲
            out.flush();
            // 定义BufferedReader输入流来读取URL的响应
            in = new BufferedReader(
                    new InputStreamReader(conn.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line;
            }
        } catch (Exception e) {
            System.out.println("发送 POST 请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输出流、输入流
        finally {
            try {
                if (out != null) {
                    out.close();
                }
                if (in != null) {
                    in.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }


    public static String sendGet(String url, String param) {
        String result = "";
        BufferedReader in = null;
        try {
            String urlNameString = url + "?" + param;
            URL realUrl = new URL(urlNameString);
            // 打开和URL之间的连接
            URLConnection connection = realUrl.openConnection();
            // 设置通用的请求属性
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent",
                    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
            connection.setRequestProperty("Content-Type","text/plain;charset=UTF-8");
            // 建立实际的连接
            connection.connect();
            // 获取所有响应头字段
            Map<String, List<String>> map = connection.getHeaderFields();
            // 遍历所有的响应头字段
            for (String key : map.keySet()) {
                System.out.println(key + "--->" + map.get(key));
            }
            // 定义 BufferedReader输入流来读取URL的响应
            in = new BufferedReader(new InputStreamReader(
                    connection.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                result += line+"\n";
            }
        } catch (Exception e) {
            System.out.println("发送GET请求出现异常！" + e);
            e.printStackTrace();
        }
        // 使用finally块来关闭输入流
        finally {
            try {
                if (in != null) {
                    in.close();
                }
            } catch (Exception e2) {
                e2.printStackTrace();
            }
        }
        return result;
    }


}
